encryption/decryption programs

[Tim and Carolyn]

Hello,

Lately I've been reading a fascinating book by David Kahn called the
"Codebreakers", and decided to try my hand at it. I wrote a little
LabVIEW program that can encrypt text or binary files and save it to a
new file. Files can be multiply encrypted with different passwords.
There is also a decryption program.

Is it any good? Beats me. I'm not a cryptanalyst. However, it was fun
to work on over the break. The software can be found on my Web site at
(diagrams are removed so you can't peek at my code):

http://www.cs.wcupa.edu/~tstarn/software.html

Cheers,

TKS

Oh yes, I also have a character frequency counter that I meant to
include. I'll upload it soon. In the meantime, here's an encrypted sample:


51194
50679 50183 49486 48933 48409 47831
54560 53891 53421 52734 52118 51492 50795
60906 60142 59553 58850 58078 57404 56734
51215 50712 49982 49478 48906 48327 47683
69042 68260 67499 66714 65942 65162 64366
38569 38095 37788 37320 36808 36395 36034

[Tim Wood]

"Tim and Carolyn" wrote in message
news:387E903A.3846B2EB@nni.com...
> Hello,
>
> Lately I've been reading a fascinating book by David Kahn called the
> "Codebreakers", and decided to try my hand at it. I wrote a little
> LabVIEW program that can encrypt text or binary files and save it to a
> new file. Files can be multiply encrypted with different passwords.
> There is also a decryption program.
>
> Is it any good? Beats me. I'm not a cryptanalyst. However, it was fun
> to work on over the break. The software can be found on my Web site at
> (diagrams are removed so you can't peek at my code):
>
> http://www.cs.wcupa.edu/~tstarn/software.html
>

You really should release the code (or at a minimum the algorithm) if you
want any serious work done o
n it.

Generally an algorithm's security is considered on the basis of the only
secret being the key. (i.e the algorhthim is known - and in most cases
plaintext-ciphertext pairs). An algorithm is generaly even supposed to
resist (within reason) releasing the key when the analyist can choose what
plaintext to encrypt.

A (good) book which seems to be read as standard by cryptographers is
Applied Cryptography by Bruce Schneier.

Have fun.

tim w

> Cheers,
>
> TKS
>

[Tim and Carolyn]

I reloaded the LabVIEW 5.0 encryption and decryption programs that I
wrote because some folks had problems with missing VI's. Hopefully,
this is now corrected.

Cheers,

TS
http://www.cs.wcupa.edu/~tstarn/software.html

Tim and Carolyn wrote:
>

[Urs]

Hello,
I got some binary files which I should encrypt/decrypt with LabVIEW.
It seemed to me, that you have here quite what I'm searching for.
Unfortunately I'm unable to open the link above.
Do you have changed the location of your software and where and how can I find it now?

Thank you very much for your help in advance.
Urs

[Enrique]

Urs;

Check my page at www.visecurity.com

Also, make sure you contact me at vargas@visecurity.com.

Regards;
Enrique